Dry-pressing brick-machine



(No Model.) i 2 Sheets- Sheet 1.

H. B. MORRISON 8v G. WILLETT.

DRY PRESSING BRICK MAGHINE.

No.276g861. Patented May 1,1883.

INVENTOR.

WITNESSES:

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' UNITED STATES PATENT OFFICE.

HENRY B. MORRISON AND GEORGE WILLETT, OF MOTLEY, MINNESOTA.

DRY-PRESSING BRICK-MACHINE.

SPECIFICATION forming part of Letters Patent No. 276,861, dated May 1, 1883. Application filed October 17, 1882. (NomodeL) To all whom it may concern.-

Be it known that we, HENRY B. MORRISON and GEORGE WILLETT, of Motley, county of Morrison, and State of Minnesota, have invented a new and Improved Dry-Pressing Brick-Machine, of which the following is a full,

clear, and exact description.

' the pressing operation, then to act more powerfullyby differential speeds while both followers are moving in the same direction to complete the pressing, and then separate for delivering the pressed bricks from the mold by an automatic feeder and discharger, the machine being contrived in a simple but very efficient arrangement, all as hereinafter fully described.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the figures. Figure l is a front elevation of our improved machine. Fig. 2 is a detail of the connection of one of the followers. Figs. 3 and 4 are sections of Fig. 1 in different positions on line a: no, part of the stands being broken out 5 and Fig. 5 is a diagram illustrating the operation of the followers.

The table a contains the mold-cavity b, in which the bricks c are to be pressed between the lower follower, c, and the upper one, d, the dry clay being fed into said cavity by the box f, which receives it from the spout y when in the position represented in Fig. 3, and drops it into said mold as it slides over the same to discharge the bricks, as represented in Fig. 4, the said feeder and discharger being shifted by the lovers h, to which it is connected by short connecting-rods, said levers being fulcrumed to stands k, and having studs at their .upper ends working in cam-slots i in a block,

7', attached to the stock 8 of the follower d.

The lower follower, c, is connected to the cross-head m below the table, which is operated by the eccentricn and connecting-rods u, and the upper follower is worked by the eccentrio 0, located between the others, all being mounted on the same shaft, t. i

The eccentrics n are set about one-sixth of the circle ahead of the other in the direction of the rotation of the shaft, and have the followers so connected to them thatwhile eccentrics n are passing the upper center, Fig. 3, follower 0 will be flush with the top of the table a, ready for the discharge of the brick e by the feeder and dischargerf, and follower d will be sufliciently higher than the brick to allow of its free discharge.

It will be seen that from the position of Fig. 2 the follower 0 will descend more rapidly than follower cl will, owing to the positions of the eccentrics, so that the mold-cavity will be well opened to receive the clay while the feeder is moviu g forward and backward over the mold, and the follower d will not descend suffiiciently to interfere with the feeder; but when eccentrics n arrive at 1, Fig. 5, or thereabout, in the dowustroke and its speed diminishes, the

follower d, gainin g on c in the more rapid travel of its eccentric from 1 to 2, will have arrived at the top of the mold-cavity, or thereabout, closing on the clay, so that when eccentrics it pass the lower center 2 and follower 0 begins to rise the two followers will converge on the soft clay until eccentric o arrives at its lower center 3. Then follower d will rise slowly from 3" to 4. while follower a, rising faster from 3 to 4 and slightly gaining on follower d, will continue the pressure with greater force until eccentrics n have arrived in that part of the upstroke where follower 0 moves slower 'than at, then 41 will ascend from off the top of the brick, so that it will be free and ready for being discharged, when it is raised to the level of the table.

It will be seen that as the density of the bricks increases and offers greater resistance the power increases by the gradual approximation of the two followers to the same speedthat is to say, by the gradual diminution of the speed with which the follower c approaches follower d to the point of nearest approach thereto-thus producing the best effects as to the density of the bricks and the economical use of the power. From the point where follower d begins to rise faster than c the brick e is released from the pressure preparatory to being discharged. The inclined parts of the cam-grooves i then act on the levers h, swinging them forward, as represented in Fig. 4, to discharge the brick and supply the mold with clay from the hoxf for the next brick.

The box f is provided with the thin plates 1), to slide under the edge of the brick and prevent it from falling into the mold when follower c descends from under the brick before the latter has been moved far enough onto the table to prevent it. The boxf has a gate, v, attached to its rear edge to advance under the spout g and prevent the fall of the clay while it is charging the mold. When the box is shifted back under the spout the clay falls into it, and when it is advanced over the mold the clay falls from the box into the mold, said box having neither bottom nor top.

The thickness of the bricks is to be regulated by shifting the follower 61 up and down on the connecting-rod s, to which it is to be fitted adjustably, as represented in Fig. 2, or in any approved way.

Having thus fully described our invention, what we claim as new, and desire to secure by Letters Patent, is

l. In a brick-machine, the combination, with the mold-cavity table, of oppositely-arranged followers and operating mechanism, said followers being adapted to converge on the clay while soft and to follow up this movement with a more powerful action by differential speed while they are both moving in the same direction, completing the pressing operation, and to separate to permit the delivery of the brick, as set forth.

2. The combination, with the table a, havin g brick-mold b, of follower d, connectin g-rod s, eccentric 0 and follower 0, cross-head m, connecting-rods u, eccentrics n, and shaft t, substantially as described.

- 3. In a brick-machine, the c0mbination,with the mold-cavity table and the follower stock or plunger, of the combined feeder and discharger connected to said plunger and adapted to push the completed-brick to one side of the mold-cavity upon the ascent of the upper follower, substantially as and for the purpose set forth.

4. The combination of feedingspout g, feeding and discharging box f, levers h, and the block j, having cam-slots i, with the followers 061 and the table at, having the brick-mold b, substantially as described.

5. The feeding and discharging boxf, havin g plate p, and being arranged with respect to the brick-mold and followers, substantially as described.

B. F. HARTsEoRN, EUGENE TOWER. 

